CA2151685A1 - Rock Bit - Google Patents

Rock Bit

Info

Publication number
CA2151685A1
CA2151685A1 CA2151685A CA2151685A CA2151685A1 CA 2151685 A1 CA2151685 A1 CA 2151685A1 CA 2151685 A CA2151685 A CA 2151685A CA 2151685 A CA2151685 A CA 2151685A CA 2151685 A1 CA2151685 A1 CA 2151685A1
Authority
CA
Canada
Prior art keywords
journal
rock bit
grease
ring
sealing surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2151685A
Other languages
French (fr)
Other versions
CA2151685C (en
Inventor
Chris E. Cawthorne
Naresh J. Kar
Steve Peterson
Madapusi K. Keshavan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith International Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2151685A1 publication Critical patent/CA2151685A1/en
Application granted granted Critical
Publication of CA2151685C publication Critical patent/CA2151685C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/25—Roller bits characterised by bearing, lubrication or sealing details characterised by sealing details

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

A rock bit for drilling subterranean formations has an improved dynamic O-ring seal for retaining lubricant around the rock bit bearings during operation of the rock bit. Such a bit has a plurality of journal pins, each having a bearing surface, and a cutter cone mounted on each journal pin and including a bearing surface. A grease reservoir is in communication with such bearing surfaces for maintaining grease adjacent to the bearing surfaces. The grease is sealed in with dynamic O-ring seals rotating against a sealing surface with a Vickers hardness of at least 1000 and vibratory burnished to have a surface finish in the range of from 5 to 32 microinches (0.13 to 0.8 micrometers) AA. Preferably, the sealing surface is formed on a seal ring interposed between the cone and journal. Preferably the sealing surface comprises a tungsten carbide composite sprayed onto the outside surface of a steel ring which is then welded to a journal.
CA002151685A 1994-06-14 1995-06-13 Rock bit Expired - Fee Related CA2151685C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25943394A 1994-06-14 1994-06-14
US08/259433 1994-06-14

Publications (2)

Publication Number Publication Date
CA2151685A1 true CA2151685A1 (en) 1995-12-15
CA2151685C CA2151685C (en) 1998-05-05

Family

ID=22984929

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002151685A Expired - Fee Related CA2151685C (en) 1994-06-14 1995-06-13 Rock bit

Country Status (3)

Country Link
US (1) US5485890A (en)
CA (1) CA2151685C (en)
GB (1) GB2290323B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5839523A (en) * 1995-02-14 1998-11-24 Sandvik Ab Methods and apparatus for lubricating a rotary cutter
DE69635360T2 (en) * 1995-04-27 2006-07-27 Weatherford/Lamb, Inc., Houston Non-rotating centering basket
US5791421A (en) * 1996-08-06 1998-08-11 Baker Hughes Incorporated Optimal material pair for metal face seal in earth-boring bits
US6171224B1 (en) * 1997-09-15 2001-01-09 Imation Corp. Finishing of tungsten carbide surfaces
EP1544321B1 (en) * 2002-09-24 2016-08-10 IHI Corporation Method for coating sliding surface of high temperature member
US9284647B2 (en) * 2002-09-24 2016-03-15 Mitsubishi Denki Kabushiki Kaisha Method for coating sliding surface of high-temperature member, high-temperature member and electrode for electro-discharge surface treatment
KR101004236B1 (en) * 2002-10-09 2010-12-24 미츠비시덴키 가부시키가이샤 Rotor and coating method therefor
US7036613B2 (en) * 2003-09-12 2006-05-02 Reedhycalog, L.P. Lip seal for roller cone drill bit
EP2140095A2 (en) * 2007-04-17 2010-01-06 Baker Hughes Incorporated Elastomer material for high temperature roller cone bits
US8418332B2 (en) * 2008-03-14 2013-04-16 Varel International Ind., L.P. Method of texturing a bearing surface of a roller cone rock bit
US8347683B2 (en) 2008-03-14 2013-01-08 Varel International Ind., L.P. Texturing of the seal surface for a roller cone rock bit
US20110048810A1 (en) * 2009-08-26 2011-03-03 Baker Hughes Incorporated Synergic surface modification for bearing seal
US8689907B2 (en) * 2010-07-28 2014-04-08 Varel International Ind., L.P. Patterned texturing of the seal surface for a roller cone rock bit
DE112014004312T5 (en) 2013-09-20 2016-06-23 Halliburton Energy Services, Inc. Elastomeric and thermally conductive carbon fiber compositions for roller drill bit seals

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896244A (en) * 1971-11-17 1975-07-22 Chromalloy American Corp Method of producing plasma sprayed titanium carbide tool steel coatings
US3879094A (en) * 1973-08-15 1975-04-22 Smith International Radial Bearings
US4029368A (en) * 1973-08-15 1977-06-14 Smith International, Inc. Radial bearings
JPH0742837B2 (en) * 1986-06-13 1995-05-10 塚本精機株式会社 Rotary shaft sealing device for cutter of drill bit
SE8801233L (en) * 1988-04-05 1989-10-06 Sandvik Ab Rotary drill bit
US4934467A (en) * 1988-12-02 1990-06-19 Dresser Industries, Inc. Drill bit wear resistant surface for elastomeric seal

Also Published As

Publication number Publication date
CA2151685C (en) 1998-05-05
GB9512021D0 (en) 1995-08-09
GB2290323B (en) 1997-06-11
GB2290323A (en) 1995-12-20
US5485890A (en) 1996-01-23

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed